Hybrid cooking appliance with microwave and induction heating features

A cooking appliance comprising:

• a cabinet defining a cooking chamber;
• a magnetron mounted within the cabinet in communication with the cooking chamber to direct a microwave thereto;
• an induction heating coil mounted within the cabinet in communication with the cooking chamber to direct a magnetic field thereto;
• and
• a one-way field filter disposed within the cabinet between the induction heating coil and the cooking chamber to restrict passage of the microwave therethrough while permitting the magnetic field, the one-way filter comprising
• a lower layer comprising a plurality of parallel conductive bands extending in a first direction, the plurality of parallel conductive bands of the lower layer being spaced apart by a set first gap in a second direction perpendicular to the first direction, each band of the plurality of conductive bands of the lower layer defining a first width in the second direction, the set first gap being between 10% and 30% of the first width, and
• an upper layer disposed above the lower layer, the upper layer comprising a plurality of parallel conductive bands extending in the second direction, the plurality of conductive bands of the upper layer being spaced apart by a set second gap in the first direction, each band of the plurality of conductive bands of the upper layer defining a second width in the first direction, the set second gap being between 10% and 30% of the second width.